For row 5, number 6 is only possible in cell (1,5)

For column 6, Number 4 is only possible in cell (6,7)

For row 2, number 2 is only possible in cell (1,2)

For column 1, Number 4 is only possible in cell (1,3)

For column 7, Number 4 is only possible in cell (7,9)

For row 4, number 3 is only possible in cell (1,4)

For row 7, number 2 is only possible in cell (9,7)

For row 9, number 2 is only possible in cell (4,9)

For row 9, number 6 is only possible in cell (9,9)

For column 7, Number 6 is only possible in cell (7,1)

For row 1, number 1 is only possible in cell (9,1)

For row 8, number 2 is only possible in cell (2,8)

For row 8, number 5 is only possible in cell (1,8)

For row 8, number 3 is only possible in cell (9,8)

For box 9, Number 9 is only possible in cell (8,7)

For row 9, number 3 is only possible in cell (3,9)

For row 2, number 3 is only possible in cell (5,2)

For row 3, number 3 is only possible in cell (2,3)

For column 2, Number 8 is only possible in cell (2,1)

For row 1, number 5 is only possible in cell (3,1)

Number 7 is the only value possible in cell (3,2).

Number 9 is the only value possible in cell (1,1).

Number 7 is the only value possible in cell (6,1).

Number 1 is the only value possible in cell (3,7).

Number 9 is the only value possible in cell (3,6).

Number 8 is the only value possible in cell (5,7).

Number 7 is the only value possible in cell (1,7).

Number 1 is the only value possible in cell (1,6).

Number 8 is the only value possible in cell (1,9).

Number 1 is the only value possible in cell (8,9).

Number 8 is the only value possible in cell (7,8).

Number 7 is the only value possible in cell (7,3).

Number 1 is the only value possible in cell (7,4).

For row 8, number 1 is only possible in cell (5,8)

For blocks 4 and 5, candidates for 5 are all in the same two rows (5 and 6)

Number 4 is the only value possible in cell (8,5).

For row 2, number 4 is only possible in cell (9,2)

X-Wing in rows for 8.

Either candidate for cell (4,2) forces 9 into cell (5,3).

Number 5 is the only value possible in cell (5,5).

Number 7 is the only value possible in cell (2,5).

Number 9 is the only value possible in cell (9,5).

Number 5 is the only value possible in cell (9,4).

Number 8 is the only value possible in cell (9,3).

Number 5 is the only value possible in cell (8,2).

Number 6 is the only value possible in cell (4,2).

Number 8 is the only value possible in cell (6,2).

Number 5 is the only value possible in cell (4,3).

Number 9 is the only value possible in cell (6,4).

Number 8 is the only value possible in cell (8,4).

Number 5 is the only value possible in cell (2,6).

Number 8 is the only value possible in cell (4,6).

Number 7 is the only value possible in cell (9,6).

Number 9 is the only value possible in cell (4,8).

Number 6 is the only value possible in cell (6,8).